Reading Bear is a great educational project propelled by Wikipeida's co-founder Larry Sanger that aims to teach kids about reading and concepts of the English language. This is a good initiative towards helping language teachers and providng them with a resource of high quality materials.

Reading Bear includes a wide range of varying media materials for kids. Kids love to learn through media and they are more motivated when visual aids are integrated. It even becomes easier for a kid to learn new things when they are presented in pictures, presentations, and sound clips.

There are several interactive quizes in the website. Students can work on them before they check correct anwser at the end. There are also around 14 presentations but Reading Bear is planning to increase it to 50 soon. I think this is a website you should try with your students.